Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Genus Cacopsylla

Foxtonian - Cacopsylla pararibesiae Pale Psyllid - Cacopsylla annulata Willow Psyllid - Cacopsylla curta - male psyllid on Salix exigua - Cacopsylla alba - female Desert Senna Psyllid - Cacopsylla nigranervosa - male Willow Psyllid Nymph - Cacopsylla Psyllid - Pear Psylla - Cacopsylla pyricola - male Cacopsylla negundinis adult - reared from nymphs collected on May 8, 2021 - Cacopsylla negundinis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Sternorrhyncha (Plant-parasitic Hemipterans)
Superfamily Psylloidea
Family Psyllidae
Subfamily Psyllinae
Genus Cacopsylla
Synonyms and other taxonomic changes
Cacopsylla was erected to include species formerly treated as Psylla but not considered to be congeneric with Psylla alni and its relatives, which are normally associated with Betulaceae. A number of subgenera have been described, but the North American species have not been assigned to them (1)
Explanation of Names
Cacopsylla Ossiannilsson 1970
>60 spp. in our area (2), >450 total (3)
Metatibia with 5 apical spurs
Holarctic; widespread in our area, most diverse in the west
About half of our native species (33 spp.) feed on Salix, most of these restricted to the west. Another large component (12 spp.) occurs on Rosaceae, especially Cercocarpus, all western. Other spp. use Adoxaceae (1 sp.) Betulaceae (2 spp.), Elaeagnaceae (3 spp.), Ericaceae (2 spp.), Grossulariaceae (3 spp.), & Sapindaceae (2 spp.)
Adventive spp. in our area use Roseaceae (3 spp.), Pittosporaceae (1 sp.), & Araliaceae (1 sp.)
This is the largest nearctic psyllid genus, containing about 20% of described species in our area.